Routing machine



Sept. 2, 1952 A. BJORKLUND 2,609,018

ROUTING MACHINE Filed Dec. 27, 1945 6 Sheets-Sheet 1 Sept. 2, 1952 A. BJQRKLUND 2,609,013

ROUTING MACHINE Filed Dec. 27, 1948 6 Sheets-Sheet 2 Sept. 2, 1952 A. BJORKLUND 2,609,018

ROUTING MACHINE Filed Dec. 27, 1948 6 Sheets-Sheet 3 rlllllLl ll /fri//i/ Bjon/u 72 J Sept. 2, 1952 A. BJORKLUND ROUTING MACHINE Filed Dec. 27, 1948 6 Sheets-Sheet 4 A. BJORKLUND ROUTING MACHINE Sept. 2, 1952 6 Sheets-Sheet 5 Filed Dec. 27, 1948 Sept. 2, 1952 A. BJORK'LUND 2,609,013

ROUTING MACHINE Filed Dec. 2'7, 1948 6 Sheets-Sheet 6 iii 10 25 iw/eii/o Patented Sept. 2, 1952 UNITED '4 STATES PATENT OFFICE ROUTING MACHINE. Arvid Bjorklund, Minneapolis, Minn. Application December 27, 1348, Serial No. 67,421

My present invention relates to a highly efficient routing machine that is easy to operate and adjust for general use in variou different kinds of routing work, and is especially well adapted for use in making core boxes.

To the above end, the invention consists of the novel devices and combination of devices hereinafter described and defined in theclaims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig, 1 is a front elevational view of the improved machine; v

Fig. 2 is a side elevational view of the same;

Fig. 3 is a rear elevational view;

Fig. 4 is a top plan view;

Fig. 5 is a view principally in section, taken on the line 5-5 of Fig. 2;

Fig. 6 is a detail view principally in section, taken on the line G- -B of Fig. 1;

Fig. 7 is a fragmentary detail view partly in elevation and partly in section, taken on the line l--'IofFig, 1;

Fig. 8 isa view principally in plan, with some parts sectioned on the line 8-fflof Fig. 2;

Fig. 9 is a fragmentary view partly in front elevation and partly in section, taken on the line 99ofFig.8;

Fig. '10 is a view of the main base and frame, as shown in Fig, 8, mountedon a piece of work, and a rail pivoted to said work;

Fig. 11 is a side view of the parts 'shown in Fig. 10,and

Fig. 12 is a fragmentary front 'elevational view of the parts shown in Fig; 10.

The numeral indicates a rectangular subbase in the form of aflat plate having on its top an annular track rail l I; A turnplate I2 is mounted on the sub-base I0 and hasin its under side, an annular groove |3 into which the track rail H extends, and holdsthe'turnplate [2 for turning movement about the axis of said track rail. 7 A pair of paralleltrac'k rails l4 are. secured in a groove l in the uppe'rlface of theside portions of the turnplate 'i 2. Supported on'the turnplate l2 isa main base [6 inthe'form' of a'flat plate having in-itslunderside, grooves 11, into which the track rails l4"extend"andhold said main base for snraigm' me' sliding movement on theturnplate I12. 'The'di's'tanc'e between the track rails l4, corresponds substantially to the diameter of the track rail ll. Theturnplate l2, and-the main ba eman. of substantially. the same size and contour, and the'siibb'ase extends materially 11 Claims. (Cl. 144-136) forwardly and rearwardly of said turnplate and main base. In the central portions of the subbase ID, the turnplate l2 and the main base [6. are aligned work and sight apertures l8, l9, and 20, respectively.

On the underside of the sub-base II], at the sides thereof, is a pair of laterally spaced angle bars 2|. Two of the flanges 22 of the angle bars 2| are turned toward each other and have flat contact with the under side ofthe sub-base I0, and the other two flanges of said angle bars extend downwardly and afford a pair of guides 23. The angle bars 2| are secured to the sub-base Ill for adjustment toward and from each other to vary the distance between the guides 23 by front and rear pairs of studs 24 equipped with thumb nuts 25. These studs 24 extend through transverse slots 26 in the sub-base l0, and the thumb nuts 25 impinge the top of said sub-base.

Integral with the main base [6 is an upright frame 21 that extends transversely thereof. This frame 21 is in the form of a flat plate reinforced by a pair of front ribs 28 and a pair of rear ribs 29. These ribs? and 29 are integral with the main base l6 and the frame 21. Formed in the frame 21, at its transverse center, is a wide opening 3|, open at-its lower end, and above this opening 3| is a narrower opening 32 that forms a continuation of the opening 3 I. The vertical edge portions of the frame 21, at the opening 32, are thickened to afiordways 33. A vertical slide 34 is mounted in the opening 32 and has in its sides channels 35'into which the ways 33 extend; This slide 34 is raised or lowered on the ways 33 by a long, upright screw rod 36 having threaded engagement with a nut-acting member 31 integral with the frame 21 at the back thereof and above the opening 32. The screw rod 36, at its lower end is attached, to permit swiveling movement, to the slide 34 at its upper end, and on the upper end of said rod is a hand wheel 38.

An electric motor 39is held, with its axis in an upright position; in a wide clamp 40 comprising a body member 4|, and apair of semi-cylindrical jaws 42. The body member 4| has a flat back and the jaws 42, have on their free ends, outturned flanges 43 that are spaced apart. These flanges 43 are adjustably connected by a pair of machine screws '44. This Zclamp 40 is slidably mounted onra pair of laterally spaced upright guide rods 45 that are in a vertical plane parallel to the fiat back of the clamp body member 4|. The armature shaft 46 of the motor 39 is ina' depending position within the apertures .l9, and 20, and attached thereto is a cutter 41. By loosening the clamp 48 the motor 89 may be raised or lowered therein.

The guide rods 45, at their upper end portions, extend through holes in bosses 48 integral with the vertical face of a slide 49 in the form of a long rectangular bar. This slide 49 is mounted in a horizontal channel 50 in front of the frame 21 at the top thereof. The guide rods 45 are secured to the slide 49 by pairs of opposing nuts that impinge opposite sides of the bosses 48. The clamp is supported in part, on a pair of coiled springs 52 encircling the guide rods and rest on washers 53 held by nuts 54 applied to the lower end portions of said rods. These springs 52, at their upper end portions, are counter sunk.

in deep holes 55 in the under side of. the clamp body member 4|.

The slide 49 is held in the channel for straight line sliding movement by a knurled thumb screw 58 that extends through a longitudinal slot 5 1 in the top of. the frame 21 and has threaded en.- gagement with said. slide. By tightening the thumb screw 56, the slide. 49 maybe lockedrelative to the frame 21 in different endwise" adjustments. The clampfiil may be securedin different vertical adjustments on the guide rodsllli by a knurled thumb. screw 5? that has: threaded. engagement with the. clamp 4d for impinging one of the guide rods 45..

On the back ofv the clamp member 4.] is a stud 59 that extends into a hole 69 in one end portion of a radius slidelil mounted on a cross-head 62 rigidly secured to the front endof a shaft 63 jourrialed. in the slide 34. at its center. The slide 6;! is adjusted on the cross-head- 62 by a long screw rod 64 thatthreaded engagement with a nut-acting lug 65 on the; cross-head 62 that extends; into. aslot. 66 in theslide 6 onthe opposite side of the shaft 88;fr om the stud;59'. This screw rod 64; is; turnablymounted in the opposite end portion of theslide 8| from the stud 59-and is held therein against. endwise-movement by a knurled head 61. and a fixed collarv 68 on the screw rod 64. The screw; rod- 64, at its inner end,

is turnably. mountedinthe slide 61 at the inner end of theslot 66. Obviously, by manipulating thescrew rod 64, the slide 5! may, be moved on the crossrhead 62 to varythe length oftheradius between the axes of thestud, 59, and the shaft 63. On, the outer end portion of theshaft (is-is a hand wheel 'BQsecuredthereto bya set-screw 18 having threaded engagementwith the hubof said handiwheel and impingingthe shaft. 63.

Mounted on'the'shaft 63 between the. slide 3% and thehand wheel69. is'a worm gear 1! that is. turned by a Worm. 1.2. on.'a shaft. 131 between bearings 14 in which. said shaft is journaled. These bearings Hare integral with the slide34 and ahand'wheel 15 is appliedto the'outer end of the shaft 13. The wormgear 1| is releasably secured. to the shaft 63 by. a set-screw16fthat has threadedengagement. with the hub of said worm gear. Obviously, the shaft 631' may be turned by thehand wheel 69 whenfthe; worm gear H is loose on the shaft 83, or itmaybe' y has been madeby the cutter 41. The horizontal flanges 22 of the angle bars 2| slidably rest on the work a: and the guide flanges 23 are closely positioned to the sides of said work to guide the machine for straight line sliding movement on said work. I

In Fig. 10, the main base [6, as shown in Fig. 8, has been removed from the turnplate l2 and slidably mounted on a piece of work 2, and a rail 18 similar to one of the rails l4. This rail 18 extends. into the left hand way H, in the main base [6 and is pivotally attached at its rear end portion to the work e by a screw 19. Obviously, by swinging the rail 18 on its pivot screw 19, the cutter 4.1 will be moved transversely of the work a in the arc of a circle. By sliding the main base It longitudinally on the rail 18, the length of the radius from the center of the screw 19 to the axis of the cutter 41 may be varied at will. To secure the main base [6 in different longitudinal adjustments on the rail 18, a set-screw 88 is. provided. This set-screw has threaded engagement with the main. base la and when tightened, impinges the rail 18. re move the main base I 6 in a. predetermined straight line, the rail 18 is securedv against pivotal movement by a second screw 81, indicated by broken lines in Fig. 10. This set -Scre BjLe tends through a hole 82 in the oppositeend, portion of the rail 18 from the screw 19, and hasthreaded engagement with the WQXK z,

What I claim is:

1. In a machine of theclass described, a base, a frame on the base, a vertical slideon the frame, screw means for raising or lowering theslide, a shaft. journaled in theslide, and having a crosshead, means forturning the shaft, a second slide on the cross-head, means foradjusting-saidsecond slide on. the. cross-headfa, motor support pivoted on the secondsllde, meansmovabl with the. second. slide forguiding motor support, an electric motor attached tothe motonsupport, and atool on thearmatureshafthfthe motor.

2. In a machine of the class-described, abase, a frame on the base, a vertical s'lide' onit'he frame, a screwmeans forraisingor lowe'ririg the slide, a shaft journaled in the slide, and having a crosshead, means. for. turning-(the shaft, a second slide on the cross-head screw means'foradjusting the second slide on'the cross-head, amotorsupport. pivoted on the. second slide, sliding means on. the frame for'Qg'uiding thev motor-support, an

. electric motor attachedfto the. motor support,

and a tool on the armature shaft ofthe motor.

3. In a machine of the class described,- a'base, a transverse frameon. the basehaving .a central upright opening and waysjatithe side. (if-said opening, a. slide mountedjon'thlways, a' hand wheel equipped.- screw I'rod, having. threaded ."en-

.gagement. with a nut acting. member, on the frame and turnablyattached to the slide, ashaft j ournaled inthe. slide. and having a, cross-head, asecond slide mountedv on the cross-head, screw means for adj ustirig'th'e, second slide ,on the crosshead, means for'turning .thejshaft, a motor support pivoted on the second slide, said frame having achanneLfathird slide mounted inLthe chanml and having. apair ofdepending guide rode on which the motor support is; slidably mounted, an electric motorattachedto the motorsupport, and a tool on 'the;.armature shaft of the. motor.

4, The structure defined in; c1aim '3,"further including'means for lockingthemotor support re la tive to the'guide rods. j 7

' 5. The structurede finedjn claimlfurther includ ng uide. rei jwifih'whiqh' the, as a sliding interlocking engagement. w

6. The structure defined in claim 1 further including a guide rail with which the base has sliding interlocking engagement, and means for locking the base relative to the guide rail.

7. The structure defined in claim 1 further including a guide rail with which the base has sliding interlocking engagement, said guide rail being angularly adjustable.

8. In a machine of the class described, a frame having a base, an electric motor mounted on the frame, a shaping tool on the armature shaft of the motor. a guide rail mounted directly on a piece of work, and means detachably securing the guide rail directly to the piece of work, said base having in its under side a groove open at its ends, said guide rail extending longitudinally through the groove with the base slidably resting on the piece of work, the sides of the groove having a working fit with the sides of the guide rail.

9. The structure defined in claim 8 in which the means for removably securing the guide rail to the piece of work is a screw at each end portion of the guide rail whereby one of the screws may be removed and the guide rail swung about the axis of the other screw to move the base on the arc of a circle.

10. The structure defined in claim 8 in which the guide rail is rectangular in cross-section.

11. The structure defined in claim 8, further including a set-screw having threaded engagement with the base at one of its sides and impinging the guide rail.

ARVID BJORKLUND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,486,121 Beckner Mar. 11, 1924 1,506,154 Berthelsen et a1. Aug. 26, 1924 1,559,926 Adair Nov. 3, 1925 1,580,097 Bayrer Apr. 6, 1926 1,688,439 Smout ..Oct. 23, 1928 1,745,780 Casey Feb. 4, 1930 1,852,736 Connell Apr. 5, 1932 1,895,054 Steinmeyer Jan. 24, 1933 1,956,835 Roemer May 1, 1934 2,022,288 Knapp Nov. 26, 1935 2,258,828 Trebert Oct. 14, 1941 2,312,356 Ocenasek Mar. 2, 1943 2,356,610 Penney Aug. 22, 1944 

